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Product Description | 2

0870557375_NC2000B_VR_Ex_A0002_IM_en

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2.3.2 Sealing Systems

Sealing systems prevent the process gas going to the bearings chambers.

The machine is equipped with oil lubricated single mechanical seal with labyrinth seal on
the motor side and oil lubricated single mechanical seal with lip seal on the suction side.

2.4 Standard Accessories

2.4.1 Resistance Thermometer

The resistance thermometer monitors the exhaust gas temperature. It can be installed at
two different places depending on the ATEX classification.

If a resistance thermometer is necessary to monitor the exhaust gas temperature, it may
be installed in either the exhaust outlet flange of the pump or in a suitable prepared ex-
haust spool piece at a distance of < 100 mm from the pump outlet.

2.4.2 Vibration Analysis System

The machine must be stopped when the vibration limit value (preset at the factory) is
reached, see 

Wiring Diagram Vibration Sensor [

 19]

.

The vibration analysis system monitors the correct mechanical operation of the machine.

This unit is composed of a vibration sensor (SA) and a transmitter (delivered loose).

2.4.3 Level Switch

The level switch (LS-/0201) detects oil leakage from the gearbox.
The level switch (LS+/0202) detects process leaks into the gearbox.

2.4.4 Pressure Transmitter

The pressure transmitter monitors the gas pressure at the discharge connection (OUT).

Warning and trip signals must be set, see Wiring Diagram Pressure Transmitter.

2.5 Optional Accessories

2.5.1 Resistance Thermometer

The resistance thermometer can be installed to monitor the cooling liquid temperature.

2.5.2 Terminal Box

The machine can be optionally equipped with a terminal box. All electrical devices, ex-
cept the motor, are already wired to the terminal box.

Summary of Contents for COBRA ATEX

Page 1: ...n Manual COBRA ATEX Dry Screw Vacuum Pumps NC 2000 B VR Vapour Recovery 0870557375 A0002_en Original instructions Modifications reserved 25 09 2018 Ateliers Busch S A Zone industrielle 2906 Chevenez S...

Page 2: ...agram 9 3 Transport 10 4 Storage 11 5 Installation 11 5 1 Installation Conditions 11 5 2 Connecting Lines Pipes 12 5 2 1 Suction Connection 12 5 2 2 Discharge Connection 13 5 2 3 Cooling Liquid Connec...

Page 3: ...7 4 1 Procedure A 29 7 4 2 Procedure C 29 7 4 3 Procedure D 29 7 4 4 Procedure F 29 8 Overhaul 30 9 Decommissioning 30 9 1 Dismantling and Disposal 30 10 Spare Parts 31 11 Troubleshooting 31 12 Techni...

Page 4: ...een designed and manufactured according to state of the art meth ods Nevertheless residual risks may remain This instruction manual highlights potential hazards where appropriate Safety notes and warn...

Page 5: ...Cooling liquid drain plug CLI Cooling liquid inlet connection CLO Cooling liquid outlet connection EB Eye bolt ECP Earth connection machine IN Suction connection INJ Injection point LS Level switch M...

Page 6: ...n be drawn in according to the scope of the Dir ective ATEX 2014 34 EU The machine is intended for the suction of explosive gases and for the placement in a potentially explosive environment according...

Page 7: ...p outlet 2 4 2 Vibration Analysis System The machine must be stopped when the vibration limit value preset at the factory is reached see Wiring Diagram Vibration Sensor 19 The vibration analysis syste...

Page 8: ...has two different nameplates A nameplate NP1 is fixed on the base frame of the machine with the ATEX marking inscription A second nameplate NP2 is fixed on the machine stage module identifying that t...

Page 9: ...p earth connection MOT ATEX Motor IIB LS Level switch PSA Pressure transmitter PS Pressure switch SA Vibration transmitter TSA Resistance thermometer 2 7 2 P ID Piping and Instrumentation Diagram IN O...

Page 10: ...to every transport or always horizontally transport the machine Make sure that the eyebolt EB is in faultless condition fully screwed in and tightened by hand Machine weight see the technical data or...

Page 11: ...to the data given on the nameplate of the motor and the nameplate of the machine NP Make sure that the ambient conditions comply with the Technical Data 33 Make sure that the environmental conditions...

Page 12: ...ger line sizes in order to avoid a loss of efficiency Seek advice from your Busch representative WARNING The connection lines can be built up by electrostatic charge Risk of severe injury Risk of expl...

Page 13: ...pressure also termed back pressure at the discharge con nection OUT does not exceed the maximum allowable discharge pressure see Tech nical Data 33 5 2 3 Cooling Liquid Connection CLI CLO INJ CLI Cool...

Page 14: ...inappropriate oil Risk of premature failure Loss of efficiency Only use an oil type which has previously been approved and recommended by Busch For oil type and oil capacity see Technical Data 33 and...

Page 15: ...level Oil filling at the suction side When the oil filling is achieved Write down the oil change date on the sticker Last oil change __ __ ____ Oil type see nameplate Change interval see instruction...

Page 16: ...nstruction manual of the Samiflex coupling 5 6 Electrical Connection DANGER Live wires Risk of electrical shock Electrical installation work must only be executed by qualified personnel Make sure that...

Page 17: ...1200 min 1 20 Hz NOTICE Incorrect connection Risk of damage to the motor The wiring diagrams given below are typical Check the inside of the terminal box for motor connection instructions diagrams 5 6...

Page 18: ...ould be used refer to the instruction manual of the ac cessory in question 5 7 1 Wiring Diagram Resistance Thermometer Part no PT100 0651 550 436 Transmitter 0643 536 800 Supplier reference PT100 Albe...

Page 19: ...Center CTC AC915 9C Vibration sensor ifm ifm electronic VSP01A Measuring transmitter ifm electronic VSE100 not ATEX certified install an intrinsic safety barrier Maintenance procedure Procedure D 29 P...

Page 20: ...ed The maximum time between two level checks is 24 hours The level switch outputs LSA 0201 and LSA 0202 are to be ignored during the cyc lic operation oft he machine 5 8 Operating Parameters Make sure...

Page 21: ...70557375_NC2000B_VR_Ex_A0002_IM_en 21 36 The quantity of cooling liquid injected should be sufficient to ensure that at no time during the operation of the pump the maximum exhaust gas outlet temperat...

Page 22: ...ng liquid inlet CLI Additional sequences may be added if optional monitoring accessories have been installed SA 0701 NO YES NO LS 0201 T T warning YES NO High vibration Warning T T trip YES NO YES NO...

Page 23: ...sons are present in the vicinity of a non noise insulated machine over extended periods Make sure that ear protection is being used 6 1 Start Up Make sure that the installation conditions see Installa...

Page 24: ...re that the machine is empty Replace all previously removed drain plugs When the work has been completed follow the procedure Start Up 23 Remove the warning board and safety perimeter Check the oil le...

Page 25: ...ired to be considered as starting values which should be shortened or extended as appropriate Particularly harsh applications or heavy duty oper ation such as high dust loads in the environment or in...

Page 26: ...MAX MIN 3 mm MAX MIN 3 mm MAX MIN 3 mm Oil sight glass on motor side Oil sight glass on suction side Fill up if necessary see Oil Filling 14 7 3 Oil Change NOTICE Use of an inappropriate oil Risk of...

Page 27: ...Maintenance 7 0870557375_NC2000B_VR_Ex_A0002_IM_en 27 36 3 2 1 Magnetic plug 2 3 5 1 7 6 4 Oil draining at the suction side Cleaning cloth Drain pan Magnetic plug...

Page 28: ...y see Technical Data 33 and Oil 33 1 2 7 8 3 6 5 MAX MIN B u s c h O il 4 Check oil level Oil filling at the motor side 1 4 1 B u s c h O il 2 3 MAX MIN 3 mm Check oil level Oil filling at the suction...

Page 29: ...hine 7 4 2 Procedure C Remove the pressure transmitter from the machine Compare it with another calibrated pressure transmitter or send it to an approved laboratory for inspection Reassemble the press...

Page 30: ...hich are dangerous to health Decontaminate the machine as well as possible and state the contamination status in a Declaration of Contamination Busch will only accept machines that come with a complet...

Page 31: ...lid foreign matter or repair the ma chine contact Busch Install an inlet filter if ne cessary The motor is defective Replace the motor The machine does not reach the usual pressure on the suction conn...

Page 32: ...temperature see Technical Data 33 Temperature of the process gases at the inlet too high Observe the permitted gas inlet temperature see Technical Data 33 Oil level too low Top up oil The oil is blac...

Page 33: ...nt pressure Atmospheric pressure Cooling liquid requirements See Operating Parameters 20 Cooling liquid Pressure of the network bar Min 1 5 Max 6 relative Cooling liquid pressure bar Max 6 Oil capacit...

Page 34: ...esign EN ISO 13857 2008 Safety of machinery Safety distances to prevent hazard zones being reached by the upper and lower limbs EN 1012 1 2010 EN 1012 2 1996 A1 2009 EN ISO 2151 2008 Acoustics Noise t...

Page 35: ...Note...

Page 36: ...an www busch co jp Korea www busch co kr Malaysia www busch com my Mexico www busch com mx Netherlands www busch nl New Zealand www busch com au Norway www busch no Peru www busch com pe Poland www bu...

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